Scalable control of large qubit arrays is challenging due to the competing requirements of addressing multiple trap sites simultaneously and being quickly reconfigurable while allowing many gates to be performed in the qubit coherence time. The former requirement can be achieved using SLMs. These devices allow a spatially varying amplitude and/or phase mask to be applied to an incident light field. When used as a hologram, an arbitrary illumination pattern can be generated on the qubit array, allowing the addressing of multiple qubit sites with high diffraction efficiency. These devices have the additional benefit of also being able to shape optical beams to allow more uniform illumination [1]} and correct some optical aberrations in the beam path [2]}. Unfortunately, the switching speed of such spatial light modulators is slow, typically 1 kHz or less for liquid crystal-based SLMs. Digital micro-mirror device SLMs may be modulated at up to 20 kHz but only provide binary amplitude modulation, which limits the diffraction efficiency to \(\le 10\%\)[3]}.
